Hi, I'm curious if you ever found an answer. I'm finding similar type problems with my 4.1 install. Certain shoots keep reporting "Loading . . ." and while they show photos, they are blurred as though only partially loaded. And the develop module doesn't seem to be working at all and there is no histogram showing.
I'm starting to believe that I may need to reinstall the program.
Bill in WV
Unfortunately I have still not been able to fix the problem. Serious nuisance as a lot of work will need to be recreated.